Band-brake.



PATENTED SEPT. 19, 1905.

A. GRIEVBS.

BAND BRAKE.

APPLICATION FILED MAYl?, 1.905.

UNTTED sTATns PATENT onirica.

ALBERT GrRIEVES, OE SPRINGFIELD, OHIOJASSIGNOR TO INTERNATIONALHARVESTER COMPANY, A CORPORATION OF NEW JERSEY.

BAND-BRAKE;

Specication of Letters Patent.

Patented Sept. 19, 1905.

Application filed May 17, 1905. Serial No. 260,908.

To a/ZZ whom, t may concern:

Be it known that I, ALBERT GRIEvEs, a citizen of the United States,residing at Springield, in the county of Clark and State of Ohio, haveinvented certain new and useful Improvements in Band-Brakes, of whichthe following is a specification, reference being had to theaccompanying drawings, forming a part thereof.

This invention relates to brake mechanism applicable to hoisting-gear,and particularly to the hoisting mechanism applied to haystackers.

It consists in a base-piece having sheaves or band-wheels mountedthereon and a brake mechanism connected to one of the sheaves andoperative to control the movement of the sheave and also a band or cablegrip operative to prevent a too rapid movement of the hoisting-rope, theobject of the invention being to provide a mechanism that may beconveniently manipulated and one that will be both powerful andeffective in operation. These objects are attained by the mechanismillustrated by the accompanying drawings, in which- Figure I is a topplan View oi' the brake y mechanism. Fig. 2 is a side elevation of` Fig.

l, and Fig. 3 is a detail of the operating-lever.

Like reference-numerals represent the same parts throughout the severalviews.

1 represents a portion of the bed-frame of a hay-stacker, 2 a base-platesecured thereto. Mounted upon the baseplate is a vertical sheave 3 and ahorizontal sheave 4, the vertical sheave being arranged in a manner toreceive the rope 5 from the horizontal one. The power is applied at theend 6 of the rope, and the end 7 is led to the secondary members ofthehoistingmechanism. (Notshown.) Integral with the horizontal sheave 4is a smoothi'aced band-wheel 8. Pivotally mounted on the base is ahand-lever 9, having an upwardly-projecting arm 10.A Connected to thearm 10 is one end of-a flexible band 11, that passes partially aroundthe wheel 8 and has its opposite end secured to a vertically-disposedear l2, forming part ofthe base 2, and connected to a depending portionI3 of the hand-lever and a plate 14, secured to the bedframe, is acoiled spring l5 operative to yieldingly draw the lever toward thebed-frame and the flexible band around the wheel 8. Mounted on avertical pivot 16 is' an arm 17, having a roller 18 journaled thereonand vate the load, the arm 17 will swing about its A pivot as the ropeis drawn straight away from the sheave, as shown by dottedlines in Fig.

I, and the ear 2O engaging with the arm l0 will move lever 9 about itspivot and release the strain upon the flexible band 11. As soon as theload is discharged and the operative power is released from the rope 6the liexible band is brought in contact with the wheel through theaction of the spring l5 and the frictional resistance of the band isincreased or diminished by means of the hand-lever 9. A coiled spring 2lsurrounds the hub of the arm 17 and is operative between the arm and afixed part of the base to hold the arm toward the horizontal sheave, andadditional force is applied to the arm through its connection with thelever 9 to regulate the speed of the returning parts.

What I claim as my invention, and desire to secure by Letters Patent,is-

l. In a band-brake, the combination of a base-plate, a sheave journaledon said plate and having a projecting rim concentric therewith, aiieXible band partially surrounding said rim and means for tighteningsaid band, a power-transmitting rope engagingwith said sheave, an armpivotally mounted on said base, said arm havinga roller rotatablymounted thereon and contacting with said rope to guide it toward thesheave, and a spring operative to swing the arm toward said sheave.

2. In a band-brake, the combination oi' a base-plate, a sheave journaledthereon. said sheave having a projecting rim concentric therewith,aiiexible band partially surrounding said rim, a lever pivotally mountedon said base, one end of said band being connected to said lever and theopposite end to said base, a power-transmitting rope engaging with saidsheave, an arm pivotally mounted on said base, said arm having a rollerrotatably mounted thereon and contacting with IOO said rope to guide ittoward the sheave, a spring operative to swing the arm toward thesheave, there being an ear upon the arm that contacts with said lever tomove said arm in the same direction.

3. In a brake mechanism, the combination of a base-plate, a sheavejournaled thereon, a power-transmitting rope engaging with said sheave,an arm pivotally mounted on said base, a roller, said roller journaledupon said arm and engaging with said rope to guide it toward the sheave,and a spring operative between said base and arm to swing the lattertoward the sheave.

4. In a brake mechanism, the combination of a base-plate, a sheavejournaled thereon, a power-transmitting rope engaging with said sheave,abrake-arm pivotally mounted on said base, a roller, said rollerjournaled upon said arm and adapted to .engage with said rope and guideit toward said sheave, there being a toe-piece beyond the roller thatcontacts with the rope when the arm is moved toward the sheave.

5. In a brake mechanism, the combination of a base-plate, a sheavejournaled thereon, a power-transmitting rope engaging with said sheave,a brake-arm having one end pivotally mounted on said base, a rollerjournaled upon the arm and engaging with the rope in a manner to guideit toward the sheave, there being a toe-piece at the opposite end ofsaid arm adapted to engage with the rope and hold it against the sheavewhen the arm is moved in that direction, and means for holding said toeagainst the rope.

6. In a band-brake mechanism, the combination of a base, a sheavejournaled thereon, said sheave having a projecting krim concentrictherewith, a flexible band partially surrounding said rim, a hand-leverpivotally mounted on said base, one end of said band being connected tosaid lever and the opposite end to said base, a coiled spr-ing connectedto said lever and the base and operative to move the lever in adirection to tighten the band, a powertransmitting rope engaging saidsheave, a 'brake-arm pivotall y mounted on said base and adapted topress the rope against said sheave, said arm contacting with saidhand-lever in a manner to be moved toward the sheave when saidhand-lever is operated to tighten said flexible band.

In witness whereof I hereto aiiiX my signature in presence of twowitnesses.

ALBERT GRIEVES.

Witnesses:

EDGAR E. NAFUs, H. B. SPERRY.

